HYOSUNG 2010 ST7, Service Manual

Page: 168 / 298

FUEL SYSTEM AND THROTTLE BODY 5-8
●
Clean all passageways with a spray-type throttle
body cleaner and blow dry with compressed air.
CLEANING
WARNING
Some throttle body cleaning chemicals, especial-
ly dip-type soaking solutions, are very corrosive
and must be handled carefully. Always follow the
chemical manufacturer’s instructions on proper
use, handling and storage.
CAUTION
Do not use wire to clean passageways. Wire can
damage passageways. If the components cannot
be cleaned with a spray cleaner it may be neces-
sary to use a dip-type cleaning solution and allow
them to soak. Always follow the chemical manu-
facturer’s instructions for proper use and clean-
ing of the throttle body components. Do not apply
throttle body cleaning chemicals to the rubber
and plastic materials.
CAUTION
Never operate the idle screw
① ①
to avoid varia-
tions of the carburetion setting.
INSPECTION
●
Check following items for any damage or clogging.
* O-ring * Throttle body
* Injector cushion seal * Fuel injector
* Throttle valve
* Vacuum hose
* Intake pipe
* Throttle shaft bushing and seal
Check fuel injector filter for evidence of dirt and con-
tamination. If present, clean and check for presence
of dirt in the fuel lines and fuel tank.
INSTALLATION
Installation is in the reverse order of removal.
Pay attention to the following points :
●
Connect the throttle cable to the throttle cable
drum.
● Adjust the throttle cable play with the cable
adjusters.
①